What is the lcm of 13 and 20, 11 and 13, 17 and 7, and 17 and 8?soon

Solve 3x-18=2y and 5x-6y=6 by elimination show work

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

Let event a = you roll an even number on the first cube.let event b = you roll a 6 on the second cube.are the events independent or dependent? why?